25
Troubleshooting
The inverter has complete protection. When a failure occurs, the inverter will take protective measures. The
general protection is to stop the motor from running and forbid it to restart within a certain period.
Fault Code
Fault type
Possible Reasons
Solution
Power off
No failure
\
\
Inc OVP
Dec OVP
Const OVP
Overvoltage
1.Input voltage is too high
2.There is large energy feedback
1.Check the voltage of solar
array
2.Check if the DEC time of the
load is too short or the inverter
starts during the rotation of the
motor
Bus low
Undervoltage
1.Input voltage is too low;
2.Illumination intensity is too
weak
Check the voltage of solar
array
Inc OCP
Dec OCP
const OCP
Overcurrent
1.The load of pump is too large;
2.The voltage of solar array is
too low;
3.The motor wiring is too long
4.The power of the inverter is
too low
5.The grounding is short
circuited or the output is phase
loss
1.Replace for a smaller pump;
2.Check voltage of solar array;
3.Shorten the wiring between
inverter and motor
4.Select the inverter with a
larger power
5. Check if the load is short
circuited
Overload Pump
Water pump is
overload
1.The motor setting rated
current is
incorrect
2.Input voltage is too low
3.Improper motor’s overload
protection threshold
4.Motor block or sudden change
of load
1.Reset the rated
current
of the
motor
2.Inspect the input power
supply
3.Set proper motor rated
current
4.Check the load and adjust
torque boost
Overload VF
Inverter is
overload
1.Acc time is too short
2.Restart the rotating motor
3.Input voltage is too low
4.the load is too heavy
1.Increase the Acc time
2.Avoid restart after power off
3.Check the power supply
4.Select bigger capacity
inverter
IGBT short
Module
overcurrent
Output short circuit or grounding
module damage
1.Check the wiring
2.Get after-sells support
Inv Overtemp
Module is
over-
temperature
1.Air flue is blocked
2.Environment temperature is
too high
3.The time of overload running
is too long.
4.Control board abnormal
1.Clean air flue or improve
ventilation
2.Degree the environment
temperature
3.Select a proper motor
4.Ask for support
Rec Overtemp
Module is
over-
temperature
Phase out loss
Output default
phase
Phase loss of U,V,W output
(or a serious unbalance in
3phase input)
1.Check the output distribution
2.Check the motor and cable
3.Get after-sells support
Summary of Contents for 1500TL2-HV
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Page 8: ...6...